define perfect square
http://www.google.com/#q=perfect+square
A perfect square is a number that can be expressed as the product of an integer multiplied by itself. In other words, it is a number that can be written in the form of n^2, where n is an integer.
To determine if a given number is a perfect square:
1. Take the square root of the number.
2. If the result is an integer, then the number is a perfect square.
For example, let's say we want to determine if 25 is a perfect square:
1. Taking the square root of 25, we get √25 = 5.
2. Since 5 is an integer, we conclude that 25 is a perfect square.
On the other hand, if we take the square root of a number and get a decimal or a fraction, it means the number is not a perfect square.
For example, if we take the square root of 17 and get √17 ≈ 4.123, we can conclude that 17 is not a perfect square.